A method and system for grading pistons with deposits is disclosed. In an embodiment, a piston with deposits is three dimensionally scanned and compared to a reference model to detect the location and geometry of the deposits. The location and geometry of the deposits are recorded and used to grade the pistons.

An experimental device for studying the propagation characteristics of stress wave in jointed rock mass at high temperatures. The device includes a launch system, a loading system, a measuring system and a heating device. The heating device can be heated in sections to meet complicated test requirements. The measuring system includes two sets of measuring devices to ensure test accuracy. One measuring device uses a strain gauge to measure the local displacement of rock, thus obtaining the change of wave velocity; this method can be used when sample temperature is low. The other device adopts digital image processing technology. The experimental device can control the initial wave form and initial wave velocity, which can better meet the test requirements. The position of the sample can be fine-tuned to avoid the impact of errors left by rock processing on the test results.

An ultrasound transducer array probe arranged as a layered structure having at least one layer of transducer array elements, and at least one further layer mounted in at least one of i) acoustic, and ii) thermal contact with said layer of transducer elements. The further layer has particles of a polymer core coated with at least one surface layer of a material that at least one of i) determines an acoustic impedance, and ii) a thermal conductivity of the further layer. The density of particles provides for a large number of particles to be in contact with neighboring particles, and the further layer is, at least across a part of its surface, coated with an electrically isolating layer that is so thin that the effect of the isolating layer on acoustic and thermal performance of the further layer is negligible.

A method and system for simultaneously performing ultrasound and thermoacoustic imaging includes directing RF energy with an RF emitter through a surface of the RF emitter and toward a region of interest within the object, wherein the region of interest has a material, a reference, and a boundary between the material and the reference, wherein the RF energy thermoacoustically induces an ultrasound signal at the surface of the RF emitter that travels through the object and reflects at the boundary; using the thermoacoustic system to receive a thermoacoustic multi-polar signal from a specific location on the boundary, wherein the thermoacoustic multi-polar signal is induced by the RF energy; receiving the reflected ultrasound signal; utilizing the thermoacoustic system and the reflected ultrasound signal to map the specific location within the object; and utilizing the thermoacoustic system and the thermoacoustic multi-polar signal to determine a parameter at the specific location.

An improved ultrasonic waveguide for an ultrasonic thermometry system is provided. The waveguide includes a series of sensing zones, each of which is tuned to a specific narrow frequency band. The waveguide is acoustically coupled to a transducer, which launches a longitudinal elastic wave of desired waveform and frequency. The wave propagates down the waveguide, and is reflected from the sensing zone that is tuned to that frequency. Each sensing zone is designed to be highly reflective to a narrow frequency band while being transparent to other frequencies.

The present invention provides a method for inspecting a material to be inspected using ultrasound waves, the method including the following step 201 to step 301, in which step 201 is performed in a condition where: the surface temperature of a material under inspectionatmospheric temperature >2 C., and inspection using ultrasound waves in step 301 satisfies: a refractive attenuation rate 1.5%. Step 201: blowing a fluid from a blowing port onto the material to be inspected. Step 301: inspecting the material to be inspected using the ultrasound waves after step 201 or at the same time as the step 201.

The present disclosure related to an experimental device for studying the propagation characteristics of stress wave in jointed rock mass at high temperature. It comprises a launch system, a loading system, a measuring system and a heating device. The heating device can be heated in sections to meet complicated test requirements. The measuring system includes two sets of measuring systems, one measuring device uses a strain gauge to measure the local displacement of rock, thus obtaining the change of wave velocity, this method can be used when sample temperature is low. The other device adopts digital image processing technology. The invention is easy to operate and can control the initial wave form and initial wave velocity, which can better meet the test requirements. The position of sample can be fine-tuned to avoid impact of errors left by rock processing on test results. The heating device can be heated in sections to meet complicated test requirements. Two sets of measuring system are adopted to ensure the test accuracy.

A downhole system includes a quartz enhanced photoacoustic spectrometer (QEPAS) configured to be positioned within a wellbore formed in a subterranean zone of a hydrocarbon formation, a sampling system coupled to the QEPAS, and a computer system connected to the QEPAS. The sampling system is configured to be positioned in the wellbore and obtain a sample of a wellbore fluid at a downhole location in the subterranean zone. The QEPAS is configured to spectroscopically scan the sample and to determine a plurality of quantities of a corresponding plurality of hydrocarbons in the same. The computer system includes one or more processors to perform operations including receiving the plurality of quantities of the plurality of hydrocarbons in the sample and determining a plurality of ratios, where each ratio is a ratio of one of the plurality of hydrocarbons with another of the plurality of hydrocarbons.

Various embodiments of a bio-inspired robot operable for detecting crack and corrosion defects in tubular structures are disclosed herein.

A method and a system is provided for measuring mechanical properties of a solid material using standard ultrasonic wave modes propagated in the solid material, which forms a waveguide, where the waveguide is encased a fluid media. The method and system can be at high temperatures. The system includes an ultrasonic transducer placed at one end of the waveguide that generates multiple wave modes, which travel in different paths along a length of the waveguide and are reflected. The system includes a set of corresponding sensors for detecting the amplitude and time of flights, and includes a processor means to analyze the detected signals.